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Ford taurus 1999 engine code PO304 whaty does it mean

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Misfire detected in cylinder 4.

If the vehicle has a lot of miles since the last tune-up, it may be time for one.

If that is not the cause, it can get complicated and a repair shop should look at it.

Posted on Sep 11, 2009

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2003 Ford Taurus with code P0316 only


Code 316 means the engine computer has detected a miss-fire on startup. You normally get a code for the cylinder causing the problem.
If the spark plugs are original, I would start with checking them for signs of damage or excessive wear.

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Code 300 is a random miss not serious enough to peg a cylinder, code 302 is for cylinder 2 and code 304 is cylinder 4. Code 402 is for an EGR flow problem.
Its possible the EGR problem is causing the missfires. The computer sets the 300 codes when RPM drops on a cylinder. The computer does not know why. So it could be spark, fuel, compression, or a vac leak.

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Vehicle is showing a code PO304 on a 2001 Ford Taurus. I have changed the fuel filter, the spark plugs, the coil,the air filter all just recently. Last year, I changed out the plug wires. Does anyone have...


Do you have spark at the number four cylinder? Check that if spark is present , then you should swap the injector from four to five and see if the miss goes with the injector. If not then you will need to test the engine compression .

May 30, 2010 | 2001 Ford Taurus

1 Answer

1999 Ford Taurus SE cruise control


If you turn the key on and the check engine light comes on then its not blown. If you start the car the light should go off within a few seconds. This desnt mean a code is not stored in memory. All it means is the problem may not of been seen twice in order for the light to stay on. You will need a data scanner to see whats going on with all your sensors. Its the only way to diagnose this. Also if you have a vacuum leak on the engine like a gasket leaking or a vacuum line not hooked up the cruise will be a problem. It could be a small crack in a vacuum line that only opens under certain conditions.

Apr 03, 2010 | 1999 Ford Taurus

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What is the PO136 code on 1999 Ford Taurus


This code is the circuit malfunction for the oxygen sensor bank 1 sensor 2. This means that the engine computer is not seeing the sensor. It may need an new sensor, have a wire between the sensor and the computer that has shorted out, or just be unplugged. Here is a link to a trouble code dictionary.

http://www.troublecodes.net/OBD2/Pcodes.shtml

Feb 13, 2010 | 1999 Ford Taurus

1 Answer

Engine code comes up PO401 which states:EGR flow insufficient. What does this mean and how do I fix it?


It means the egr valve is sticking pull it off and clean the pintal valve. Or replace it.

Nov 20, 2009 | 1999 Ford Taurus

1 Answer

1999 taurus service engine lite just came on with 58,809 miles on it, what does that mean most of the time???


The service engine light could mean a lot of things. If your car is still running fine and you don't notice any problems it could be EGR system or the E VAP system, but above all it means you need to have it checked. Most auto parts stores will check them for free and give you the code number and the meaning. When you get that you should repost your question.

Apr 08, 2009 | 1999 Ford Taurus

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1996 Ford Taurus Chugging MAF


Did you buy a Ford MAF sensor? There are some brands that are not reliable or accurate. Buy a Ford MAF sensor, if your mechanic has decided that the MAF is faulty. You may have a leaking fuel injector, bad coolant temp sensor,bad oxygen sensor,dirty air filter, clogged exhaust system.

Aug 25, 2008 | 1999 Ford Taurus

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